Wallpaper collection that fits best to high res 16:9/16:10 aspect ratio's.
Clone the directory from your home directory.
cd ~/Pictures # You can also choose a different location
git clone --depth=1 https://github.com/pearsonc/wallpaper.git
cd wallpaper/
You can update the wallpapers with
cd ~/Pictures/wallpaper
git pull
Great download resources for wallpapers are: